I have 2016 520c loaded heavy with 10” atlas
with 25 fury two men 1/2 to 3/4 tank I can hit 72 with no problem.loaded light with 1/4 tank 75 by gps
i am typically on 7-9 on my jack plate gauge and rarely move it unless
i raise it in shallow water
i would adjust your plate so the prop shaft is 2 1/2 to 3 1/2 inches below the pad then adjust for your sweet spot